Britan thought that by spreading the enemies forces, it would be easier to take them out. The enemy forces would be less concentrated in a single area.
The attorney general is not
Reconstruction ended with the Compromise of 1877. The Compromise of 1877 allowed for Federal Troops to be removed from the South and for the South to deal with African-Americans as they chose in return for the acceptance of the Republican President, Rutherford B. Hayes.
In short, the Republicans gave away the farm and most African-Americans were disenfranchised by the early 1900s.
America joined the war late, this meant that America was not crippled Total production of American industry increased by 50% in the 1920s.